drivers/infiniband/hw/cxgb3/iwch_mem.c

   1 /*
   2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <asm/byteorder.h>
  33
  34 #include <rdma/iw_cm.h>
  35 #include <rdma/ib_verbs.h>
  36
  37 #include "cxio_hal.h"
  38 #include "iwch.h"
  39 #include "iwch_provider.h"
  40
  41 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
  42                                         struct iwch_mr *mhp,
  43                                         int shift,
  44                                         __be64 *page_list)
  45 {
  46         u32 stag;
  47         u32 mmid;
  48
  49
  50         if (cxio_register_phys_mem(&rhp->rdev,
  51                                    &stag, mhp->attr.pdid,
  52                                    mhp->attr.perms,
  53                                    mhp->attr.zbva,
  54                                    mhp->attr.va_fbo,
  55                                    mhp->attr.len,
  56                                    shift-12,
  57                                    page_list,
  58                                    &mhp->attr.pbl_size, &mhp->attr.pbl_addr))
  59                 return -ENOMEM;
  60         mhp->attr.state = 1;
  61         mhp->attr.stag = stag;
  62         mmid = stag >> 8;
  63         mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
  64         insert_handle(rhp, &rhp->mmidr, mhp, mmid);
  65         PDBG("%s mmid 0x%x mhp %p\n", __FUNCTION__, mmid, mhp);
  66         return 0;
  67 }
  68
  69 int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
  70                                         struct iwch_mr *mhp,
  71                                         int shift,
  72                                         __be64 *page_list,
  73                                         int npages)
  74 {
  75         u32 stag;
  76         u32 mmid;
  77
  78
  79         /* We could support this... */
  80         if (npages > mhp->attr.pbl_size)
  81                 return -ENOMEM;
  82
  83         stag = mhp->attr.stag;
  84         if (cxio_reregister_phys_mem(&rhp->rdev,
  85                                    &stag, mhp->attr.pdid,
  86                                    mhp->attr.perms,
  87                                    mhp->attr.zbva,
  88                                    mhp->attr.va_fbo,
  89                                    mhp->attr.len,
  90                                    shift-12,
  91                                    page_list,
  92                                    &mhp->attr.pbl_size, &mhp->attr.pbl_addr))
  93                 return -ENOMEM;
  94         mhp->attr.state = 1;
  95         mhp->attr.stag = stag;
  96         mmid = stag >> 8;
  97         mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
  98         insert_handle(rhp, &rhp->mmidr, mhp, mmid);
  99         PDBG("%s mmid 0x%x mhp %p\n", __FUNCTION__, mmid, mhp);
 100         return 0;
 101 }
 102
 103 int build_phys_page_list(struct ib_phys_buf *buffer_list,
 104                                         int num_phys_buf,
 105                                         u64 *iova_start,
 106                                         u64 *total_size,
 107                                         int *npages,
 108                                         int *shift,
 109                                         __be64 **page_list)
 110 {
 111         u64 mask;
 112         int i, j, n;
 113
 114         mask = 0;
 115         *total_size = 0;
 116         for (i = 0; i < num_phys_buf; ++i) {
 117                 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
 118                         return -EINVAL;
 119                 if (i != 0 && i != num_phys_buf - 1 &&
 120                     (buffer_list[i].size & ~PAGE_MASK))
 121                         return -EINVAL;
 122                 *total_size += buffer_list[i].size;
 123                 if (i > 0)
 124                         mask |= buffer_list[i].addr;
 125                 else
 126                         mask |= buffer_list[i].addr & PAGE_MASK;
 127                 if (i != num_phys_buf - 1)
 128                         mask |= buffer_list[i].addr + buffer_list[i].size;
 129                 else
 130                         mask |= (buffer_list[i].addr + buffer_list[i].size +
 131                                 PAGE_SIZE - 1) & PAGE_MASK;
 132         }
 133
 134         if (*total_size > 0xFFFFFFFFULL)
 135                 return -ENOMEM;
 136
 137         /* Find largest page shift we can use to cover buffers */
 138         for (*shift = PAGE_SHIFT; *shift < 27; ++(*shift))
 139                 if ((1ULL << *shift) & mask)
 140                         break;
 141
 142         buffer_list[0].size += buffer_list[0].addr & ((1ULL << *shift) - 1);
 143         buffer_list[0].addr &= ~0ull << *shift;
 144
 145         *npages = 0;
 146         for (i = 0; i < num_phys_buf; ++i)
 147                 *npages += (buffer_list[i].size +
 148                         (1ULL << *shift) - 1) >> *shift;
 149
 150         if (!*npages)
 151                 return -EINVAL;
 152
 153         *page_list = kmalloc(sizeof(u64) * *npages, GFP_KERNEL);
 154         if (!*page_list)
 155                 return -ENOMEM;
 156
 157         n = 0;
 158         for (i = 0; i < num_phys_buf; ++i)
 159                 for (j = 0;
 160                      j < (buffer_list[i].size + (1ULL << *shift) - 1) >> *shift;
 161                      ++j)
 162                         (*page_list)[n++] = cpu_to_be64(buffer_list[i].addr +
 163                             ((u64) j << *shift));
 164
 165         PDBG("%s va 0x%llx mask 0x%llx shift %d len %lld pbl_size %d\n",
 166              __FUNCTION__, (unsigned long long) *iova_start,
 167              (unsigned long long) mask, *shift, (unsigned long long) *total_size,
 168              *npages);
 169
 170         return 0;
 171
 172 }